CVE-2025-13763 Libopensc: opensc: multiple uses of uninitialized variable
Attackers with physical access can use crafted smart cards to trigger uninitialized variable usage, causing information disclosure or crashes in OpenSC.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-13763?
CVE-2025-13763 is a medium-severity vulnerability in OpenSC, published on 23 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Multiple uses of uninitialized variables were found in libopensc that may lead to information disclosure or application crash. An attack requires a crafted USB device or smart card that would present the system with specially crafted responses to the APDUs
Weakness: CWE-457
Which versions are affected by CVE-2025-13763?
How do I fix CVE-2025-13763?
Apply the vendor's patch.
Is CVE-2025-13763 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-13763 exists.
Sources
Also known as BELL-CVE-2025-13763, DEBIAN-CVE-2025-13763, GHSA-2v44-fq35-98vv, UBUNTU-CVE-2025-13763.